You must use your own assets. No premade assets are allowed;
Share your work. One of the aims of GGJ is to help others learn from your work, so please assist with this by allowing people to tinker with the results of your work. You must share any code and assets you use for creating the game (as long as you are legally allowed to share them without breaking any other legal agreements). Don't share any code belonging to your employer or anyone else other than yourself, or upload anything that is under NDA or other legal constraints.
Remember the licensing. All uploads (code, assets, executables) will be shared and licensed under the Attribution-NonCommercial-ShareAlike 4.0 International Creative Commons License.
